11.24: Two wave pulses travel to the ricp,l8;ato:uz y t) q4x 1h0apoght toward a rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures best represents the superposition of the pulses when the centers of the ind4)hcalzqax0,:81;yo op tuptividual pulses coincide?

  08.30: A light beam passes through the air and strikes the surgx2b,lgbd 0bwbte*0,,8emxd5bhjo 1w/v : m aface of a plastic block. Which pair of statements correctly describ/xl8eob w2 gge:*0 vat0 wjbb5dbmx,1 ,dh,mbes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straight dowvrgi9zto,s2; ulv9k9 nward through the point labeled B in the diagram shown. The ray ro krt9ugs929v ,zi;vleaches a flat mirror placed at an angle $\Theta$ to the horizontal as shown. Which one of the locations labeled in the figure best represents the point through which the ray reflected from the mirror will pass?

  00.04: Specular reflection occurs whenever light is id*jnull y;qo;9x51awncident on

  05.18: A student hold a hand mirror to observe the za1n6at88i1t0h6 spri-t3 : z p/gmqehuq )rlback of her head while standing in front of and looking into a wall mirror. ltmrpri n1tpe-h3 z6q uzgt6 q:)hs180i/a a8If she is standing 4 ft in front of the wall mirror and she holds the hand mirror 1 ft behind her head, she will see the back of her head how far behind the wall mirror?

  14.25: It is observed that a l-gz4h(1y.zv biow l(*pqjv po3f pc/) ight ray changes direction when it enters a new material. Which one of the following choices is the term best a*4bp v/qh(1(f.zog3oicvw l-zjpy) pssociated with this phenomenon?

  96.19: Light that has wavelength of 500 qe 8twjlv-63 nnm in air has wavelength 400 nm in a transparent material. What is the index ojteq3 v -n68lwf refraction of the material?

  98.04: As sound travels from steel into air, both its speed ov8 okvdz9sau3+ 1d k;and its:

  00.01: As a wave moves from one medium tdx2kqq15u c tksmlz *)bgdd: h8/ma,0 o a second medium with a different index os1gm5c * abltdz q28uq/mkk ) d0hd,:xf refraction which of the following wave properties would NEVER change?

  05.47: A sound wave generated from a /7 gqu-6tej y rsoj/w8tuning fork of single frequency travels from air (with speed of sound 340 m/s) into rock (with speed of sound 1500 m/s). Which statement is true about the wavelength and frequency / qet sjj8-wgruoy/76of the sound as it passes from air to rock?

  14.28: A waterproof speaker placedfdzda dt1j/jq.s9 s +i sqvj98j(u, :z at the bottom of a swimming pool emits a sound wave that travels toward the surfvdjsfdqi+ 1zjt/,:dq9.z(jsua8 j9s ace of the water. In the water, the sound wave has a frequency $f_{water}$, wavelength $\lambda_{water}$ , and wave speed $v_{water}$ . When the sound wave enters the air it has a frequency $f_{air}$ ,wavelength $\lambda_{air}$, and wave speed $v_{air}$ . Which one of the following relationships correctly compares the frequencies, wavelengths, and wave speeds of the waves in the air and water?

  02.33: A short burst of white light strikes a rectangular glass block with an -amk6(ft+ jogangle (jfgk +otam-6 of incidence of $0^0$. Which color of transmitted light would be the first to emerge from the opposite side?

  96.02: A beam of light is directed toward a point P on a boundary as shown to t ctajb/o2 l6u6he rig 62/jcua l6otbht. Which segment best represents the refracted ray?

  98.17: Which diagram best rep;gq,l zb009j 4tz/l olywki b)jg, fm4resents what happens to a ray of light entering air from water? Ai4w/0,l)f zgjti jzyk;gb 0ql,lm4 bo9r is at the top in all diagrams.

  94.11: The critical angle of a material is the an+ ndf36 narpo ,k(msn+gle of incidence for which the angle of refrac+snnfrm op+ 6kad,n 3(tion is:

  95.12: The principle underlying f9-pxxet 4y0mxt)b /fs i:r;mtiber optics is:

  98.36: The critical angle in a transparent substancexo 5g 7/i 1bhr-qtk-fj surrounded by air is $30^{\circ}$. The speed of light in
the substance (in multiples of $10^8$ m/s) is most nearly

  01.28: Light travels from material X with an index of refraction of n = 1v:z5 50tt0.onlqdn(ybyv 9ef.5 to material Y with an index of refraction of n = 2.0. If the speed of light in material Y is v, what is the speed of lighyqtfdnv 5bye:v9 (ln.0 0t5ozt in material X?

  03.15: A jeweler can di zz ) 7p*1 *n6csjbi3/q;1ua ddcqfbswstinguish between a diamond and a piece of glass by observing the critical angle of the ligp; nbu)ab dsij z7* 1/6 cqzq1d3w*sfcht in each material. Glass with an index of refraction of 1.52 has a critical angle of $41.1^{\circ}$ while a diamond with an index of refraction of 2.42 would have a critical angle of:

  05.26: Light shines frrju )m2tc ba*.om air into a clear material. When the light makes an angle of um. )t2jr c*abincidence equal to $30.0^{\circ}$, the light refracts at an angle of 1$5.0^{\circ}$. If the light is shone from an angle of incidence of $60.0^{\circ}$, what is the angle of refraction?

  95.40: A Metrologic lase .j2o d07,ieh03 cvkbxy)bbk fr is embedded in a material of index of refraction n. The laser beam emerges fk2b7i )hb,ye3.x ovd cfb0 0jkrom the material and hits a target. See the accompanying figure for the position parameters of the laser and target. The value of n is:

  95.31: A beam of light passes from medium ko;ty -jy o2r;1 to medium 2 to medium 3 as shown in the accompanying figure. What is true about the respejyyo; o rk-t2;ctive indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 to medium 3 as show+x3wu9)ul *mo6xdhr4q c;wppn in the diagram. What may be concluded about the three indexes of mwud;)wlxc6h p 9p4+ oquxr *3 refraction, n1, n2 and n3?

  97.24: The accompanying diagram shows the path that a light ray takes passin+68f0)k9w8u i o4 slhpqqfme* do r8wjg through three transparent materials. The indices of refraction in materials 1, 2, and 3 are n1, n2, and n3, uh8iqw9f)+sqo4 mf868 kjw0oredl* prespectively. Which of the following best describes the relation between the indices of refraction?

  09.34: The diagram below orv5 q: 4m ,*nudk4ztlsq7el0 shows the path taken by a monochromatic light ray traveling through threeu4dz q e5no: q7v sr,kml0tl4* media.The symbols $v_1$,$\lambda_1$ , and $f_1$ represent the speed, wavelength, and frequency of the light in Medium 1, respectively. Which of the following relationships for the light in the three media is true?

  99.26: A beam of light traveling in glass (rwlp(h h qf;b.sckx:/0,ag 6 c$n_g$=1.5) strikes a boundary with air ($n_a$ =1.0) at point P.The angle
of incidence is $60^{\circ}$ as shown in the diagram. Which ray would best indicate the beam’s path after point P?

  04.35: A ray of light is incident on the surface of a rectangular block of glaslm0tl c,3rg4 abuufnv(-;d7 vs at an angle o buvcfmlg 04ln u(,-3vrta;7df $45^{\circ}$. It refracts into the glass and then strikes the side of the block as shown in the diagram. What would be the most likely path of the light after striking the side of the glass block?

  13.27: Light of wavelength 600nm z/g2/)e r4emeym 2wxw is transmitted from air into a piece of glass. Which one of the labeled arrows best indicates the path of the light ray w/mg r/wme24xe yze)2 after it enters the glass?

  14.44: A ray of monochromatic light enters the right-triangular gbe*g9w yrzg6- *rq uo)lass as shown. The glass has an index of refraction of 2.00 and it is surrounded by air. Which one of the lettered rays shogg6- zqye*)br9 wr uo*ws the path of the light after it exits the glass?